Shrink wrap machine

ABSTRACT

This invention relates to a shrink wrap machine, which includes a central column and a shrink film synchronous transmission equipment. Said central column is provided with a first column and a second column which are configured to mutual suspended separation for removing the connection between the first column and the second column so that the shrink wrap machine can be expand to fit onto the desired diameter range of bottles or cans and increase the application of the shrink-film. When the shrink-film is opened by the first column of the center column, the shrink-film will be continuously transport by the label feeding rollers and the label pulling rollers of said shrink film synchronous transmission equipment. After the shrink-film is cut by the cutter equipment, a piece of the shrink-film will be pulled down by the label pulling rollers and the second guide pulleys and the shrink-film will be wrapped on the surface of the bottles or cans. Then the conveying equipment will convey the bottles and cans toward to the next equipment and making the shrink film and the bottles or cans be shrunk packaging completely.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation-in-part of and claims the prioritybenefit of U.S. application Ser. No. 14/965,747, filed on Dec. 10, 2015.The entirety of the above-mentioned patent application is herebyincorporated by reference herein and made a part of this specification.

BACKGROUND OF THE INVENTION

1. Field of the Invention

This invention relates to a shrink wrap machine, particularly referringto a shrink wrap machine with a first column and a second column on thecenter column which are separated from each other in suspended means, sothat the cutting knife will not be limited by the cutter trough betweenthe first column and the second column when the cutting knife in cuttingthe shrink-film.

2. Description of the Prior Art

As shown in FIGS. 1 and 2, as the currently marketed shrink wrapmachine, which includes center column provided with a first column A0and a second A1. There are an active transport wheel set and a driventransport wheel set provided on said first column A0 for pulling downthe shrink-film, and a cutter trough A4 is provided between the firstcolumn A0 and the second column A1. Said cutter trough A4 is surroundedthe periphery of said center column, and the first column A0 and thesecond column A1 are connected by a center rod B.

However, because of the center rod B between the first column A0 and thesecond column A1, all of the cutting knifes C0, C1, C2 and C3 of thecutter equipment C of the prior shrink wrap machine can not pass throughthe center point of the shrink-film, so that the shrink-film cuttingranges D0, D1, D2 and D3 cut by the cutting knifes C0, C1, C2 and C3will be limited, and it must be set at least four or more cutting knifesto cut the shrink-film. Therefore, the cutting efficiency of shrink-filmD is not good and the size which the bottles or cans can be wrapped willbe limited by said center rod B.

In addition, the shrink-film cut by the cutter equipment C of the priorshrink wrap machine will generate the shrink wrinkles problem when saidshrink-film be transported to the most lower end of the center column A,so that the percent defective of wrapping the bottles or cans will beincreased and it results a lower economic benefit problem.

To this end, the present inventor with many years of experience in thedesign and manufacture of related equipment, studied the structureproblem especially for the foregoing prior art to carry out thisinvention.

SUMMARY OF THE INVENTION

The purpose of this invention is to provide a transportation equipmentwith the label feeding rollers, the label pulling rollers and the cutterequipment provided between the label feeding rollers and the labelpulling rollers for unhindered transported any thickness of shrink-filmdown toward the most lower end of the center column, then to beaccurately and completely wrapped on the outer surface of the bottles orcans. Moreover, with the detached and suspended first column and secondcolumn, the gap of the cutter trough can be adjusted freely and therange cut by the cutting knifes of the cutter equipment will not belimited, so that the application of the shrink-film in the presentinvention is unrestricted and the shrink-film can be wrapped on theouter surface of any desired diameter range of bottles or cans.

To achieve the foregoing object, the shrink wrap machine of thisinvention includes a center column, a shrink film synchronoustransmission device and a cutter equipment. Said center column isprovided with a first column and a second column which are separatedfrom each other in suspended means, a cutter trough is set between thefirst column and the second column, at least one pair of symmetricalfirst guide pulleys with no power are set at two sides of foregoingfirst column of center column, at least a pair of symmetrical secondguide pulleys are set in the rear of the foregoing second column ofcenter column, said second guide pulleys are driven rotation by thepower member. Said shrink film synchronous transmission device is setbetween the first guide pulleys and the second guide pulleys, saidshrink film synchronous transmission device is provided with at least apair of symmetrical label feeding rollers and at least a pair ofsymmetrical label pulling rollers, the label feeding rollers and thelabel pulling rollers are driven by the power equipment to synchronousrotation the label feeding rollers and the label pulling rollers, andthe first column and the second can be held and suspended in the airrespectively by the label feeding rollers and the label pulling rollers.Said cutter equipment is set on the side of the foregoing cutter troughof center column and between the label feeding rollers and the labelpulling rollers for cutting the shrink-film on the cutter trough, saidcutter equipment is provided with at least one cutting knife(s), therange cut by the cutting knife(s) of the cutter equipment can be equalor more than the radius of the shrink-film.

The shrink wrap machine of this invention can delete the foregoing firstpulleys and the first balanced bearings when the shrink film synchronoustransmission device is provided with at least two pair of symmetricallabel feeding rollers and at least a pair of symmetrical label pullingrollers.

The shrink wrap machine of this invention is provided with a pluralityof first balanced bearings inside the foregoing first column which arecorresponding to each first guide pulleys thereof for co-rotation withthe first guide pulleys; a plurality of second balanced bearings are setinside the foregoing second column and corresponding to the upper endand the lower end of each second guide pulleys, the space formed betweentwo adjacent second balanced bearings can contain the second guidepulleys so that the second balanced bearings and the second guidepulleys can be matched with the shrink film synchronous transmissiondevice to jointly balance and position the second column.

The shrink wrap machine of this invention are respectively set with twofirst support bearing and two second support bearing inside theforegoing first column and second column and corresponding to theposition of each label feeding rollers and each label pulling rollers;the space formed by two adjacent first support bearing is for containingits corresponding label feeding rollers, and the first column of thecenter column will be held and suspended in the air by the label feedingrollers and the first support bearing; the space formed by two adjacentsecond support bearing is for containing its corresponding label pullingrollers, and the second column of the center column will be held andsuspended in the air by the label pulling rollers and the second supportbearing.

BRIEF DESCRIPTION OF DRAWINGS

This invention will be better understood by referring to theaccompanying drawings, wherein:

FIG. 1 is a partial view of the center column of the prior shrink wrapmachine;

FIG. 2 is a partial view of the prior shrink wrap machine, which showsthe shrink-film be cut by the cutter equipment;

FIG. 3 is a partial left side view of the shrink wrap machine in thepresent invention;

FIG. 4 is a partial back side view of the shrink wrap machine in thepresent invention;

FIG. 5 is a partial right side view of the shrink wrap machine in thepresent invention;

FIG. 6 is a partial view of the center column of the shrink wrap machinein the present invention;

FIG. 7 is a partial view of the center column of the shrink wrap machinein the present invention, which shows the shrink-film be transported bythe center column;

FIG. 8 is a partial view of the shrink wrap machine in the presentinvention, which shows the shrink-film be cut by the cutter equipment;and

FIG. 9 is an enlarged view of a part shown in FIG. 7.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Herein below preferred the shrink wrap machine of this invention will bedescribed in detail with reference to the accompanying drawings.

As shown in FIGS. 3 and 4, the shrink wrap machine of this inventionincludes at least a center column 1 and a shrink film synchronoustransmission device 2 and a cutter equipment 3. Said center column 1 isprovided with a first column 1 a and a second column 1 b which areseparated from each other in suspended means, with the separatedsuspended structure of the first column 1 a and the second column 1 b,this invention can solve the problem of the prior shrink wrap machinecaused by the center rod between the first column 1 a and the secondcolumn 1 b, so that the diameter of the shrink-film 4 used in the shrinkwrap machine of this invention will not be limited, and all kinds ofdiameter of the bottles or cans can be packaged by shrink-film 4 toimprove the packing efficiency and application range of the shrink-film4. There is a cutter trough 1 c provided between the first column 1 aand the second column 1 b, said cutter trough 1 c is a kind of throughgroove and the gap d of the cutter trough 1 c can be adjusted freely byadjusting the relative position of the first column 1 a and the secondcolumn 1 b, so that the interval between the cutting knife(s) of thecutter equipment 3 and cutter trough 1 c can be reduced for easily tocut the shrink-film.

As shown in FIGS. 3-7, a shrink film unfolding sheet 10 is fixed on thetop of the foregoing first column 1 a, so that the flat shrink-filmsheet 4 (as shown in FIG. 7) can be unfolded via the foregoing shrinkfilm unfolding sheet 10. At least a pair of symmetrical first guidepulleys 11 with no power are set at two sides of the foregoing firstcolumn 1 a of center column 1 for balancing the first column 1 a andfixing the position of the center column 1 together with the shrink-film4 synchronous transmission device 2. Said first guide pulleys 11 areplaced at the front side and back side of center column 1, the best iscorresponding to the orientation of the second guide pulleys 12. Aplurality of first balanced bearings 11 a are set inside the foregoingfirst column 1 a and corresponding to the first guide pulleys 11 thereoffor co-rotation with the first guide pulleys 11.

At least a pair of symmetrical second guide pulleys 12 are set in therear of the foregoing second column 1 b of center column 1 anddistributed on two side of the second column 1 b so that the secondcolumn 1 b will be held and suspended in the air by the symmetricalsecond guide pulleys 12, said second guide pulleys 12 are drivenrotation by the power member 120. A plurality of second balancedbearings 12 a are set inside the foregoing second column 1 b andcorresponding to the upper end and the lower end of each second guidepulleys 12, the space d1 formed between two adjacent second balancedbearings 12 a can contain the second guide pulleys 12 so that the secondbalanced bearings 12 a and the second guide pulleys 12 can be matchedwith the shrink film synchronous transmission device 2 to jointlybalance and position the second column 1 b. The shrink-film 4 can bewrap on the outer surface of bottles or cans by using the second column1 b pulled down the shrink-film 4 when the shrink-film 4 be transporteddown to the second column 1 b by the label pulling rollers 21 of theshrink film synchronous transmission device 2.

The shrink film synchronous transmission device 2 is set at the middleposition of the foregoing center column 1 and between the first guidepulleys 11 and the second guide pulleys 12, said shrink film synchronoustransmission device 2 is provided with at least a pair of symmetricallabel feeding rollers 20 and at least a pair of symmetrical labelpulling rollers 21. Furthermore, the foregoing first pulleys 11 and thefirst balanced bearings 11 a can be deleted when the shrink filmsynchronous transmission device 2 is provided with at least two pair ofsymmetrical label feeding rollers 20 and at least a pair of symmetricallabel pulling rollers 21. Said label feeding rollers 20 aresymmetrically set on two side of the first column 1 a and said labelpulling rollers 21 are symmetrically set on two side of the secondcolumn 1 b, the best is the orientation of the label feeding rollers 20and the label pulling rollers 21 respectively perpendicular to theorientation of the foregoing first guide pulleys 11 and second guidepulleys 12. The label feeding rollers 20 and the label pulling rollers21 are driven by the power equipment 22 (belonging to conventional, norepeat) to synchronous rotation the label feeding rollers 20 and thelabel pulling rollers 21, so that the shrink-film 4 transported by thelabel feeding rollers 20 will be continuously pulled down by the labelpulling rollers 21 and this shrink film transported mode will not belimited by the shrink-film with different thickness.

Inside the foregoing first column 1 a and second column 1 b,corresponding to the position of each label feeding rollers 20 and eachlabel pulling rollers 21 are respectively set with two first supportbearing 20 a and two second support bearing 21 a. The space d2 formed bytwo adjacent first support bearing 20 a is for containing itscorresponding label feeding rollers 20 (as FIGS. 6 and 7), and the firstcolumn 1 a of the center column 1 will be held and suspended in the airby the label feeding rollers 20 and the first support bearing 20 a. Thefirst support bearing 20 a will be driven rotation by the label feedingrollers 20 to synchronously transport down the shrink-film when thelabel feeding rollers 20 are driven rotation by the power equipment 22.In the same way, The space d3 formed by two adjacent second supportbearing 21 a is for containing its corresponding label pulling rollers21, and the second column 1 b of the center column 1 will be held andsuspended in the air by the label pulling rollers 21 and the secondsupport bearing 21 a. The second support bearing 21 a will be drivenrotation by the label pulling rollers 21 to synchronously pull down theshrink-film when the label pulling rollers 21 are driven rotation by thepower equipment 22. Therefore, with the label feeding rollers 20, thefirst support bearing 20 a, the label pulling rollers 21 and the secondsupport bearing 21 a, the center column 1 can complete the separatedsuspended structure of the first column 1 a and the second column 1 b inthe present invention, and with the label feeding rollers 20 and thelabel pulling rollers 21 synchronously transport down the shrink-film 4,this invention can prevent the shrink-film 4 cut by the cutter equipment3 to generate the shrink wrinkles problem, and no matter what variousthickness of the shrink-film all can be unhindered transported downtoward the most lower end of the center column 1 then to be wrapped onthe outer surface of the bottles or cans by the foregoing second guidepulleys 12 and the second balanced bearings 12 a.

As shown in FIGS. 6-9, the cutter equipment 3 is set on the side of theforegoing cutter trough 1 c of center column 1 and between the labelfeeding rollers 20 and the label pulling rollers 21 for cutting theshrink-film 4 on the cutter trough 1 c. The cutter equipment 3 can becomposed of one or more cutting knife(s), it's all depending on therequirement of the user. In the embodiment of the three cutting knifes30, 31 and 32 of the cutter equipment 3 shown in FIGS. 8 and 9, with theseparated suspended structure of the center column 1 and the throughgroove structure of the cutter trough 1 c, the range cut by the cuttingknifes 30, 31 and 32 of the cutter equipment 3 can be equal or more thanthe radius of the shrink-film 4, to make the cutting knifes 30, 31 and32 of the cutter equipment 3 achieve the effect of to increase cuttingrange, not to be restricted by cutter trough 1 c, to reduce the numberof cutting knife and to regularly cut off the shrink-film 4, so that,even if with only a cutting knife, it also can unhindered cut the wholeshrink-film. Therefore, the shrink-film 4 with the minimum diameter canbe cut off and the application of the shrink-film 4 will not be limited.

In summary, with the label feeding rollers 20, the label pulling rollers21 and the cutter equipment 3 provided between the label feeding rollers20 and the label pulling rollers 21, this invention can operate matchingshrink-film with a variety of thickness, and the shrink-film will beunhindered transported down toward the most lower end of the centercolumn 1 then to be accurately and completely wrapped on the outersurface of the bottles or cans. Moreover, with the detached andsuspended first column 1 a and second column 1 b, the gap d of thecutter trough 1 c can be adjusted freely and the range cut by thecutting knifes of the cutter equipment 3 will not be limited, so thatthe application of the shrink-film 4 in the present invention isunrestricted and it can be wrapped on the outer surface of any desireddiameter range of bottles or cans. These are advanced components of thisinvention.

While the preferred embodiments of this invention have been describedabove, it will be recognized and understood that various modificationsmay be made therein and appended claims are intended to cover all suchmodifications that may fall within the spirit and scope of theinvention.

What is claimed is:
 1. A shrink wrap machine at least comprising: acenter column is provided with a first column and a second column whichare separated from each other in suspended means, a cutter trough is setbetween the first column and the second column, said cutter trough is akind of through groove and the gap of the cutter trough can be adjustedfreely by adjusting the relative position of the first column and thesecond column, a shrink film unfolding sheet is fixed on the top of theforegoing first column, at least one pair of symmetrical first guidepulleys with no power are set at two sides of foregoing first column ofcenter column for balancing and holding the first column, at least apair of symmetrical second guide pulleys are set in the rear of theforegoing second column of center column and distributed on two side ofthe second column for holding and suspending the second column in theair, said second guide pulleys are driven rotation by the power member;a shrink film synchronous transmission device is set between the firstguide pulleys and the second guide pulleys, said shrink film synchronoustransmission device is provided with at least a pair of symmetricallabel feeding rollers and at least a pair of symmetrical label pullingrollers, said label feeding rollers are symmetrically set on two side ofthe first column and said label pulling rollers are symmetrically set ontwo side of the second column, the label feeding rollers and the labelpulling rollers are driven by the power equipment to synchronousrotation the label feeding rollers and the label pulling rollers, andthe first column and the second can be held and suspended in the airrespectively by the label feeding rollers and the label pulling rollers;and a cutter equipment is set on the side of the foregoing cutter troughof center column and between the label feeding rollers and the labelpulling rollers for cutting the shrink-film on the cutter trough, saidcutter equipment is provided with at least one cutting knife(s), and therange cut by the cutting knife(s) of the cutter equipment can be equalor more than the radius of the shrink-film.
 2. The shrink wrap machineas claimed in claim 1, wherein the orientation of said second guidepulleys is corresponding to the orientation of said first guide pulleys.3. The shrink wrap machine as claimed in claim 1, wherein a plurality offirst balanced bearings are set inside the foregoing first column andcorresponding to each first guide pulleys thereof for co-rotation withthe first guide pulleys.
 4. The shrink wrap machine as claimed in claim1, wherein a plurality of second balanced bearings are set inside theforegoing second column and corresponding to the upper end and the lowerend of each second guide pulleys, the space d1 formed between twoadjacent second balanced bearings can contain the second guide pulleysso that the second balanced bearings and the second guide pulleys can bematched with the shrink film synchronous transmission device to jointlybalance and position the second column.
 5. The shrink wrap machine asclaimed in claim 1, wherein the orientation of the label feeding rollersand the label pulling rollers are perpendicular to the orientation ofthe first guide pulleys and the second guide pulleys.
 6. The shrink wrapmachine as claimed in claim 1, wherein inside the foregoing firstcolumn, corresponding to the position of each label feeding rollers isset with two first support bearing, the space formed by two adjacentfirst support bearing is for containing its corresponding label feedingrollers and the first column of the center column will be held andsuspended in the air by the label feeding rollers and first supportbearing.
 7. The shrink wrap machine as claimed in claim 1, whereininside the foregoing second column, corresponding to the position ofeach label pulling rollers is set with two second support bearing, thespace d3 formed by two adjacent second support bearing is for containingits corresponding label pulling rollers, and the second column of thecenter column will be held and suspended in the air by the label pullingrollers and the second support bearing.
 8. A shrink wrap machine atleast comprising: a center column is provided with a first column and asecond column which are separated from each other in suspended means, acutter trough is set between the first column and the second column,said cutter trough is a kind of through groove and the gap of the cuttertrough can be adjusted freely by adjusting the relative position of thefirst column and the second column, a shrink film unfolding sheet isfixed on the top of the foregoing first column, at least a pair ofsymmetrical second guide pulleys are set in the rear of the foregoingsecond column of center column and distributed on two side of the secondcolumn for holding and suspending the second column in the air, saidsecond guide pulleys are driven rotation by the power member; a shrinkfilm synchronous transmission device is set between the first guidepulleys and the second guide pulleys, said shrink film synchronoustransmission device is provided with at least two pair of symmetricallabel feeding rollers and at least a pair of symmetrical label pullingrollers, said label feeding rollers are symmetrically set on two side ofthe first column and said label pulling rollers are symmetrically set ontwo side of the second column, the label feeding rollers and the labelpulling rollers are driven by the power equipment to synchronousrotation the label feeding rollers and the label pulling rollers, andthe first column and the second can be held and suspended in the airrespectively by the label feeding rollers and the label pulling rollers;and a cutter equipment is set on the side of the foregoing cutter troughof center column and between the label feeding rollers and the labelpulling rollers for cutting the shrink-film on the cutter trough, saidcutter equipment is provided with at least one cutting knife(s), and therange cut by the cutting knife(s) of the cutter equipment can be equalor more than the radius of the shrink-film.
 9. The shrink wrap machineas claimed in claim 8, wherein a plurality of second balanced bearingsare set inside the foregoing second column and corresponding to theupper end and the lower end of each second guide pulleys, the spaceformed between two adjacent second balanced bearings can contain thesecond guide pulleys so that the second balanced bearings and the secondguide pulleys can be matched with the shrink film synchronoustransmission device to jointly balance and position the second column.10. The shrink wrap machine as claimed in claim 8, wherein theorientation of the label feeding rollers and the label pulling rollersare perpendicular to the orientation of the first guide pulleys and thesecond guide pulleys.
 11. The shrink wrap machine as claimed in claim 8,wherein inside the foregoing first column, corresponding to the positionof each label feeding rollers is set with two first support bearing, thespace formed by two adjacent first support bearing is for containing itscorresponding label feeding rollers and the first column of the centercolumn will be held and suspended in the air by the label feedingrollers and first support bearing.
 12. The shrink wrap machine asclaimed in claim 8, wherein inside the foregoing second column,corresponding to the position of each label pulling rollers is set withtwo second support bearing, the space formed by two adjacent secondsupport bearing is for containing its corresponding label pullingrollers, and the second column of the center column will be held andsuspended in the air by the label pulling rollers and the second supportbearing.